When shopping for backpacks, I looked at all brands and felt Stihl had the best combination of comfort, performance, ease of maintenance, starting, and durability. Plus easy part access and a great warranty. I have used the 550 and my 600 magnum side by side, and even blowing light grass off of a street or drive, you can tell a difference. The 550 honestly seems like a waste to me. The extra power is really worth the 50 or some bucks. If stihl didnt exist, Husqvarna would be my second choice in handheld. But to me, The br 600 magnum is the ultimate.

Dont let the low sound fool or specs fool you. In real world conditions, its just as efficient and powerful as the 8001, 8500, 770, or 580bts. why? I have honestly used them all and can tell you that in reality one may be alittle stronger, but weights more. It all equallys out in the end really. There all very close in real performance. If you cant move it with a Br 600, You need alot more than a backpack blower.